The golden boy of Germany's 2014 World Cup-winning team has struggled to maintain the form that took him from Dortmund to Pep Guardiola's Bayern Munich in 2013.

Sky Sports News understands Marseille and Valencia are also interested in signing the 26-year old, and Dortmund will be keen to recoup the vast majority of the £22m they paid Bayern last summer to bring him back to Signal Iduna Park.

Mario Gotze scored an extra-time winner for Germany in the 2014 World Cup final against Argentina

Since then, Gotze - who scored Germany's winning goal in the 2014 World Cup final against Argentina - has shown signs of regaining top form, but failed to impress enough to find a place in Joachim Low's squad for the impending tournament in Russia.

The attacking midfielder made 23 Bundesliga appearances for Dortmund last season, scoring twice and providing a further four assists.